[v6,00/17] Introduce Nuvoton Arbel NPCM8XX BMC SoC

This patchset  adds initial support for the Nuvoton 
Arbel NPCM8XX Board Management controller (BMC) SoC family. 

The Nuvoton Arbel NPCM8XX SoC is a fourth-generation BMC.
The NPCM8XX computing subsystem comprises a quadcore ARM 
Cortex A35 ARM-V8 architecture.

This patchset adds minimal architecture and drivers such as:
Clocksource, Clock, Reset, and WD.

Some of the Arbel NPCM8XX peripherals are based on Poleg NPCM7XX.

This patchset was tested on the Arbel NPCM8XX evaluation board.

Addressed comments from:
 - Arnd Bergmann: https://www.spinics.net/lists/arm-kernel/msg991125.html
 - Christophe JAILLET : https://www.spinics.net/lists/kernel/msg4410204.html

Changes since version 5:
 - NPCM8XX clock driver
	- Remove refclk if devm_of_clk_add_hw_provider function failed.
 - NPCM8XX clock source driver
	- Remove NPCM8XX TIMER_OF_DECLARE support, using the same as NPCM7XX.

Changes since version 4:
 - NPCM8XX clock driver
	- Use the same quote in the dt-binding file.

Changes since version 3:
 - NPCM8XX clock driver
	- Rename NPCM8xx clock dt-binding header file.
	- Remove unused structures.
	- Improve Handling the clocks registration.
 - NPCM reset driver
	- Add ref phandle to dt-binding.

Changes since version 2:
 - Remove NPCM8xx WDT compatible patch.
 - Remove NPCM8xx UART compatible patch.
 - NPCM8XX clock driver
	- Add debug new line.
	- Add 25M fixed rate clock.
	- Remove unused clocks and clock name from dt-binding.
 - NPCM reset driver
	- Revert to npcm7xx dt-binding.
	- Skip dt binding quotes.
	- Adding DTS backward compatibility.
	- Remove NPCM8xx binding include file.
	- Warp commit message.
- NPCM8XX device tree:
	- Remove unused clock nodes (used in the clock driver)
	- Modify gcr and rst node names.

Changes since version 1:
 - NPCM8XX clock driver
	- Modify dt-binding.
	- Remove unsed definition and include.
	- Include alphabetically.
	- Use clock devm.
 - NPCM reset driver
	- Modify dt-binding.
	- Modify syscon name.
	- Add syscon support to NPCM7XX dts reset node.
	- use data structure.
 - NPCM8XX device tree:
	- Modify evb compatible name.
	- Add NPCM7xx compatible.
	- Remove disable nodes from the EVB DTS.

Tomer Maimon (17):
  dt-bindings: timer: npcm: Add npcm845 compatible string
  dt-bindings: serial: 8250: Add npcm845 compatible string
  dt-bindings: watchdog: npcm: Add npcm845 compatible string
  dt-binding: clk: npcm845: Add binding for Nuvoton NPCM8XX Clock
  clk: npcm8xx: add clock controller
  dt-bindings: reset: npcm: add GCR syscon property
  ARM: dts: nuvoton: add reset syscon property
  reset: npcm: using syscon instead of device data
  dt-bindings: reset: npcm: Add support for NPCM8XX
  reset: npcm: Add NPCM8XX support
  dt-bindings: arm: npcm: Add maintainer
  dt-bindings: arm: npcm: Add nuvoton,npcm845 compatible string
  dt-bindings: arm: npcm: Add nuvoton,npcm845 GCR compatible string
  arm64: npcm: Add support for Nuvoton NPCM8XX BMC SoC
  arm64: dts: nuvoton: Add initial NPCM8XX device tree
  arm64: dts: nuvoton: Add initial NPCM845 EVB device tree
  arm64: defconfig: Add Nuvoton NPCM family support

 .../devicetree/bindings/arm/npcm/npcm.yaml    |   7 +
 .../bindings/arm/npcm/nuvoton,gcr.yaml        |   2 +
 .../bindings/clock/nuvoton,npcm845-clk.yaml   |  49 ++
 .../bindings/reset/nuvoton,npcm750-reset.yaml |  10 +-
 .../devicetree/bindings/serial/8250.yaml      |   1 +
 .../bindings/timer/nuvoton,npcm7xx-timer.yaml |   2 +
 .../bindings/watchdog/nuvoton,npcm-wdt.txt    |   3 +-
 MAINTAINERS                                   |   2 +
 arch/arm/boot/dts/nuvoton-common-npcm7xx.dtsi |   1 +
 arch/arm64/Kconfig.platforms                  |  11 +
 arch/arm64/boot/dts/Makefile                  |   1 +
 arch/arm64/boot/dts/nuvoton/Makefile          |   2 +
 .../dts/nuvoton/nuvoton-common-npcm8xx.dtsi   | 170 +++++
 .../boot/dts/nuvoton/nuvoton-npcm845-evb.dts  |  30 +
 .../boot/dts/nuvoton/nuvoton-npcm845.dtsi     |  76 +++
 arch/arm64/configs/defconfig                  |   3 +
 drivers/clk/Kconfig                           |   6 +
 drivers/clk/Makefile                          |   1 +
 drivers/clk/clk-npcm8xx.c                     | 600 ++++++++++++++++++
 drivers/reset/reset-npcm.c                    | 206 +++++-
 .../dt-bindings/clock/nuvoton,npcm845-clk.h   |  49 ++
 21 files changed, 1196 insertions(+), 36 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/clock/nuvoton,npcm845-clk.yaml
 create mode 100644 arch/arm64/boot/dts/nuvoton/Makefile
 create mode 100644 arch/arm64/boot/dts/nuvoton/nuvoton-common-npcm8xx.dtsi
 create mode 100644 arch/arm64/boot/dts/nuvoton/nuvoton-npcm845-evb.dts
 create mode 100644 arch/arm64/boot/dts/nuvoton/nuvoton-npcm845.dtsi
 create mode 100644 drivers/clk/clk-npcm8xx.c
 create mode 100644 include/dt-bindings/clock/nuvoton,npcm845-clk.h